161612481 has 4 divisors (see below), whose sum is σ = 215483312. Its totient is φ = 107741652.

The previous prime is 161612449. The next prime is 161612483. The reversal of 161612481 is 184216161.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 161612481 - 2⁵ = 161612449 is a prime.

It is a super-2 number, since 2×161612481² = 52237188029950722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161612483) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26935411 + ... + 26935416.

It is an arithmetic number, because the mean of its divisors is an integer number (53870828).

Almost surely, 2^161612481 is an apocalyptic number.

It is an amenable number.

161612481 is a deficient number, since it is larger than the sum of its proper divisors (53870831).

161612481 is an equidigital number, since it uses as much as digits as its factorization.

161612481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53870830.

The product of its digits is 2304, while the sum is 30.

The square root of 161612481 is about 12712.6897625955. The cubic root of 161612481 is about 544.7011587254.

The spelling of 161612481 in words is "one hundred sixty-one million, six hundred twelve thousand, four hundred eighty-one".